A train accelerates at -1.5 m/s2 for 10 seconds. If the train had an initial speed of 32 m/s, what is its new speed? A. 17 m/s

Question

A train accelerates at -1.5 m/s2 for 10 seconds. If the train had an initial
speed of 32 m/s, what is its new speed?
A. 17 m/s
B. 15 m/s
C. 47 m/s
D. 32 m/s

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Nguyệt Ánh 4 years 2021-08-16T10:44:46+00:00 1 Answers 33 views 0

Answers ( )

  1. ngockhue
    0
    2021-08-16T10:46:10+00:00
    Reply

    Answer:

    17 m/s

    Explanation:

    Using formula a = (v-u) /t

    acceleration a =  -1.5 m/s2

    final velocity v = unknown

    initial velocity u = 32 m/s

    time t = 10s

    -1.5 = (v-32)/10

    -15 = v – 32

    -15 + 32 = v

    v = 17 m/s

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